Lecture_8_Signals_part_3

Flash cards lecture 8

Data Transmission

Data Transmission

The transmission of data via digital or analog signals.

Digital Transmission

Transmission of digital data using digital signals.

Analog Transmission

Transmission of data in analog form.

A/D Conversion

Analog-to-Digital Conversion, the process of converting analog signals into digital data.

Line Coding

The method of converting a string of 1’s and 0’s into a sequence of signals.

Block Coding

A technique to improve line coding by adding redundant bits for error detection and synchronization.

Parallel Transmission

Transmission mode where multiple bits are sent simultaneously.

Serial Transmission

Transmission mode where bits are sent one after another.

Asynchronous Transmission

A method where transmission includes start and stop bits with variable gaps.

Synchronous Transmission

Transmission without start/stop bits or gaps, where the receiver groups the bits.

Pulse Code Modulation (PCM)

A method of converting analog signals to digital signals using sampling, quantizing, and encoding.

Sampling Rate

The frequency at which an analog signal is sampled.

Quantization

The process of mapping continuous signal values to a finite number of levels.

Digital Modulation

The process of varying one or more characteristics of a carrier signal to transmit digital information.

Amplitude Shift Keying (ASK)

A modulation technique where the amplitude of the carrier signal represents binary data.

Frequency Shift Keying (FSK)

A modulation method where the frequency of the carrier signal is varied to represent binary data.

Phase Shift Keying (PSK)

A modulation technique where the phase of the carrier signal is changed to represent binary data.

Analog Modulation

The process of varying an analog signal to encode information for transmission.

Nyquist Theorem

The principle stating that the sampling rate must be at least twice the highest frequency in the signal.

Quantization Error

The difference between the actual analog value and the quantized digital value.

Carrier Signal

An analog signal used as a basis for transmitting information.

Modulation

The process of varying a carrier signal with an input signal to encode information.

What is Amplitude Shift Keying (ASK)?

A modulation technique where the amplitude of the carrier signal represents binary data, enabling the transmission of digital information.

What is Frequency Shift Keying (FSK)?

A modulation method where the frequency of the carrier signal is varied to represent binary data, allowing for reliable communication in digital systems.

What is Phase Shift Keying (PSK)?

A modulation technique that changes the phase of the carrier signal to encode binary data, providing a robust method of transmitting digital information.

What is the role of a carrier signal in modulation?

The carrier signal acts as the baseline waveform that is modified by the input signal's information, making it possible to transmit the data over various communication channels.